CN111675894A

CN111675894A - Polyurea material and preparation method and application thereof

Info

Publication number: CN111675894A
Application number: CN202010621944.6A
Authority: CN
Inventors: 周志证; 卢奕奕; 陈应培; 李志超
Original assignee: Yingde Xizhou Gas Co ltd
Current assignee: Yingde Xizhou Gas Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-18

Abstract

The invention discloses a polyurea material, which comprises a resin component and a curing component; the raw materials of the resin component comprise, by weight, 40-70 parts of polyurea resin and 80-100 parts of filler; the curing component comprises a curing agent and a plasticizer, wherein the weight ratio of the curing agent to the plasticizer is (2-12): 1; the weight ratio of the resin component to the curing component is 1: (0.05-1.0). The polyurea material obtained by the invention has the hardness of more than HB, can be quickly cured to form a film, has high toughness, high impact resistance and high wear resistance, can be used for preparing marking paint with various functional colors, and has the advantages of environmental protection, no solvent pollution, no heating construction, high curing speed, wear resistance, impact resistance, scratch resistance, high toughness, long service life and the like compared with the existing marking paint.

Description

Polyurea material and preparation method and application thereof

Technical Field

The invention relates to the field of floor finishing, in particular to a polyurea material and a preparation method and application thereof.

Background

The marking paint is a marking line which is suitable for various types of asphalt and concrete in scenes such as parking lots, factories, roads and the like and has the functions of diversion, drainage, indication and warning. Since the scribing varnish is often exposed to the outdoors and places with dense pedestrian and traffic flows, the hardness and toughness of the scribing varnish are high.

The existing marking paint in the market is usually prepared by adding a specific auxiliary agent into an acrylic resin emulsion, the relationship between the hardness and the toughness of a coating film is difficult to balance, the mode of improving the hardness of the coating film is usually achieved by sacrificing the toughness of the coating film, and few marking paint products with high hardness and high toughness are available. Meanwhile, the existing marking paint in the market has the following problems: the construction process needs to be carried out under heating, the operation is complex, the coating quality is difficult to control, the curing speed is slow, the wear resistance is poor, and the phenomenon of powder falling is easy to occur after long-time use.

Disclosure of Invention

In order to solve the above technical problems, a first aspect of the present invention provides a polyurea material comprising a resin component and a curing component; the raw materials of the resin component comprise, by weight, 40-70 parts of polyurea resin and 80-100 parts of filler; the curing component comprises a curing agent and a plasticizer, wherein the weight ratio of the curing agent to the plasticizer is (2-12): 1; the weight ratio of the resin component to the curing component is 1: (0.05-1.0).

As a preferable technical scheme, the filler is selected from one or more of talcum powder, quartz sand, titanium dioxide, calcium carbonate, barium sulfate, calcium sulfate, zinc oxide, alumina, mica powder, wollastonite, magnesium hydroxide, feldspar powder, glass powder, kaolin, fly ash, diatomite and carbon black.

As a preferable technical scheme, the particle size of the filler is 45-100 mu m.

As a preferable technical scheme, the resin component also comprises 0-70 parts by weight of solvent, except 0.

As a preferable technical scheme, the raw materials of the resin component also comprise 5-25 parts by weight of an auxiliary agent.

As a preferable technical scheme, the auxiliary agent is selected from one or more of a dispersing agent, a foam inhibitor, a color paste, a silane coupling agent, a reinforcing fiber, a pearling agent, a night light agent and a stabilizing agent.

As a preferable technical scheme, the acid value of the dispersing agent is 30-40 mgKOH/g.

In a preferable embodiment, the viscosity of the dispersant at 25 ℃ is 100 to 300 mPas.

The second aspect of the present invention provides a preparation method of the polyurea material, comprising the following steps:

step one, resin component preparation: mixing and stirring the polyurea resin, the filler and the rest raw materials uniformly to obtain a resin component;

step two, preparation of curing components: uniformly mixing a curing agent and a plasticizer to obtain a curing component;

step three, material preparation: and uniformly mixing the resin component and the curing component in proportion to obtain the polyurea material.

As a preferable technical scheme, the thickness of the coating film is 50-80 μm.

A third aspect of the invention provides a use of the polyurea material in a paint line.

Has the advantages that: the polyurea material prepared by the invention through the resin component and the curing component which are composed of polyurea resin, filler, dispersant, foam inhibitor and the like has the hardness of more than HB, the impact strength of more than or equal to 50kg.cm, and no powder body falls after the polyurea material is placed for one month. In addition, the polyurea material has the characteristics of quick curing and film forming, high toughness and high wear resistance, can be used for preparing the marking paint with various functional colors, such as weather resistance, high hardness, high wear resistance, high toughness and high adhesive force, and has the advantages of environmental protection, no solvent pollution, no heating construction, quick curing, higher wear resistance, impact resistance, scratch resistance, high toughness, long service life and the like compared with the existing marking paint.

Detailed Description

The technical features of the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, and the scope of protection is not limited thereto.

The words "preferred", "more preferred", and the like, in the present invention refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

In order to solve the above technical problems, a first aspect of the present invention provides a polyurea material including a resin component and a curing component.

In a preferred embodiment, the weight ratio of the resin component to the curing component is 1: (0.05-1.0).

In a more preferred embodiment, the weight ratio of the resin component to the curing component is 1: (0.1-0.5).

In a further preferred embodiment, the weight ratio of the resin component to the curing component is 1: 0.25.

in a preferred embodiment, the raw material of the resin component comprises 40-70 parts of polyurea resin and 80-100 parts of filler by weight.

In a more preferred embodiment, the raw material of the resin component includes 55 parts by weight of the polyurea resin, 90 parts by weight of the filler.

(polyurea resin)

Polyurea resin, known by the english name of polyurethane Elastomer (PUA), is a polyaspartic acid ester prepared by adding maleic acid ester and a secondary amino organic substance.

The invention does not specially limit the purchasing manufacturer and the type of the polyurea resin, preferably, the amine value of the polyurea resin is 185-205 mgKOH/g, for example, German Bayer Desmophen NH1420 can be purchased, the amine value is 199-203 mgKOH/g, or German Bayer Desmophen NH1520, and the amine value is 189-193 mgKOH/g. The amine number, refers to the number of milligrams of perchloric acid and equivalent potassium hydroxide required to neutralize 1g of basic amine; the method for measuring the amine value in the present invention is not particularly limited, and various methods for measuring the amine value, such as acid-base titration, known to those skilled in the art, can be used.

(Filler)

In a preferred embodiment, the filler is selected from one or more of talc, quartz sand, titanium dioxide, calcium carbonate, barium sulfate, calcium sulfate, zinc oxide, alumina, mica powder, wollastonite, magnesium hydroxide, feldspar powder, glass powder, kaolin, fly ash, diatomite and carbon black.

In a more preferred embodiment, the filler is selected from the group consisting of talc, quartz sand, titanium dioxide, and combinations thereof.

In a further preferred embodiment, the filler is a combination of talc and titanium dioxide.

In a preferred embodiment, the weight ratio of the titanium dioxide to the talcum powder is (0-15): 15, except 0.

In a more preferred embodiment, the weight ratio of the titanium dioxide to the talcum powder is (1-5): 15.

in a more preferred embodiment, the weight ratio of the titanium dioxide to the talc is 1: 5.

in a preferred embodiment, the filler has a particle size of 45 to 100 um.

In a more preferred embodiment, the filler has a particle size of 58 μm.

In a preferred embodiment, the titanium dioxide is rutile titanium dioxide.

The high wear-resistant and impact-resistant material can be prepared by a solvent-free method and a solvent method.

(solvent)

In a preferred embodiment, the resin component further comprises 0-70 parts by weight of a solvent, except 0.

The invention has no special requirement on the dosage of the solvent, and a proper amount of solvent can be added to adjust the viscosity of the system to be moderate according to the actual use condition. Preferably, the solvent is a solvent without hydroxyl, amino, carboxyl groups, including but not limited to: toluene, xylene, ethyl acetate, butyl acetate, dimethyl carbonate.

In a preferred embodiment, the raw material of the resin component further comprises 5-25 parts by weight of an auxiliary agent.

(auxiliary agent)

In a preferred embodiment, the raw material of the resin component further includes 15 parts by weight of an auxiliary agent.

In a preferred embodiment, the auxiliary agent is selected from one or more of a dispersing agent, a foam inhibitor, a color paste, a silane coupling agent, a reinforcing fiber, a pearlizing agent, a night light agent and a stabilizing agent.

In a more preferred embodiment, the auxiliary agent is selected from one or more of a combination of a dispersing agent, a foam inhibitor, a color paste, and a silane coupling agent.

In a preferred embodiment, the auxiliary agent comprises a dispersing agent, a foam inhibitor, a color paste and a silane coupling agent.

In a preferred embodiment, the weight ratio of the dispersing agent, the foam inhibitor, the color paste and the silane coupling agent is (0.1-1.0): (0.05-0.15): (4.0-5.0): (8.0-12.0).

In a more preferred embodiment, the weight ratio of the dispersing agent, the foam inhibitor, the color paste and the silane coupling agent is 0.5: 0.1: 4.4: 10.0.

dispersing agent

In a preferred embodiment, the dispersant is a polymeric dispersant.

In a preferred embodiment, the acid value of the dispersant is 30 to 40 mgKOH/g.

In a more preferred embodiment, the acid value of the dispersant is 35 mgKOH/g.

The acid number refers to the number of milligrams of equivalent potassium hydroxide required to neutralize 1g of material; the method for measuring the acid value is not particularly limited in the present invention, and various methods for measuring an acid value, such as acid-base titration, known to those skilled in the art can be used.

In a preferred embodiment, the dispersant has a viscosity of 100 to 300 mPas at 25 ℃.

In a more preferred embodiment, the viscosity of the dispersant is 100 mPas at 25 ℃.

The viscosity unit, mPas, i.e., mPas, is a unit of dynamic viscosity, and is 1m each of two areas in a fluid²The distance is 1m, and the relative moving speed is 1 m/s. The method for measuring the viscosity is not particularly limited in the present invention, and various methods for measuring the viscosity, such as a rotational viscometer method, known to those skilled in the art, can be used.

Such dispersants are commercially available, for example from the German Digaku model No. 628 dispersant, having an acid number of 35mgKOH/g and a viscosity of 100 mPas at 25 ℃.

Suds suppressor

The present invention is not particularly limited to the use of suds suppressors, and various suds suppressors known to those skilled in the art, such as silicone suds suppressors, can be used.

Color paste

The color paste used in the invention is not particularly limited, and the color pastes with various types and colors, which are well known by the technicians in the field and have good system compatibility, can be selected according to the actual use requirements.

Silane coupling agent

The silane coupling agent used in the present invention is not particularly limited, and various coupling agents containing amino group and hydroxyl group, which are well known to those skilled in the art, such as silane coupling agent KH560, can be used.

In a preferred embodiment, the raw materials of the curing component comprise a curing agent and a plasticizer, and the weight ratio of the curing agent to the plasticizer is (2-12): 1.

in a more preferred embodiment, the raw materials of the curing component comprise a curing agent and a plasticizer, and the weight ratio of the curing agent to the plasticizer is 9: 1.

(curing agent)

In a preferred embodiment, the curing agent is an isocyanate curing agent.

In a more preferred embodiment, the curing agent is an aliphatic hydrocarbon isocyanate curing agent.

The aliphatic hydrocarbon isocyanate curing agent provided by the invention is a compound which only contains two elements of carbon and hydrogen in a molecule except isocyanate groups, carbon atoms are connected with each other to form a chain or a ring, and the carbon atoms are connected through covalent bonds to form a chain or a ring-shaped carbon skeleton. The specific choice of the aliphatic hydrocarbon isocyanate is not particularly limited in the present invention and various aliphatic hydrocarbon isocyanate curing agents known to those skilled in the art can be used, such as hexamethylene diisocyanate trimer, available as Bayer BAYER curing agent N75, Germany.

(plasticizer)

In a preferred embodiment, the plasticizer is a phthalate plasticizer.

As the phthalate plasticizer, there are included, but not limited to: phthalate, dibutyl phthalate, diethyl phthalate, dioctyl phthalate, butyl benzyl phthalate, di (2-ethyl) hexyl phthalate, diisononyl phthalate, dimethyl terephthalate.

In a more preferred embodiment, the plasticizer is diisononyl phthalate (DINP).

In the research and development process, the inventor finds that when a filler composed of talcum powder and titanium dioxide with a certain proportion and a particle size of 45-100 mu m is used and a dispersant with an acid value of 30-40 mgKOH/g and a viscosity of 100-300 mPa & s at 25 ℃ is matched with the filler, the hardness and toughness of the polyurea material marking paint can be improved simultaneously, and the phenomenon that powder falls off after the marking paint is used for a long time is avoided. The inventor believes that on one hand, the dispersant with certain viscosity and acid value is matched with components such as silane coupling agent, etc., and the multiple anchoring points can be adsorbed on the surface of the filler such as talcum powder, titanium dioxide, etc. with specific particle size, and the filler is dragged to be uniformly dispersed in the system through the electrostatic repulsion effect. On the other hand, under the synergistic action of acid groups contained in the molecules of the dispersing agent, the uniformly dispersed filler can form van der Waals force with the specific urea bond of the polyurea resin in the system, so that the uniformly dispersed filler is uniformly adsorbed in the interior of the line paint, and the powder falling phenomenon is not easy to occur after long-term use; the adsorption point of the paint after being mixed with the curing component is also used as a physical crosslinking point, and the formation of a rigid crosslinking system in a paint film of the marking paint can be promoted, so that the hardness of the marking paint is improved. Meanwhile, an organic silicon foam inhibitor is further added, the proportion of the aliphatic hydrocarbon isocyanate curing agent to the plasticizer is controlled, excessive entanglement of macromolecular chains is favorably reduced while migration of the plasticizer is reduced, external impact force is dispersed together with the filler, hardness of the obtained scribing paint is guaranteed, and toughness of the obtained scribing paint is improved.

The polyurea material of the present invention is applied to the surface of a substrate, and the substrate is not particularly limited, and various floor finishing substrates known to those skilled in the art, such as asphalt or concrete, can be used.

In a preferred embodiment, the thickness of the coating film after the polyurea material is applied is 50 to 80 μm.

In a preferred embodiment, the first step, the method for preparing the resin component, comprises the following steps: adding polyurea resin into a reactor, adding a dispersing agent and a foam inhibitor under stirring at the rotating speed of 100-400 rpm, stirring uniformly, adding a filler under stirring at the rotating speed of 200-400 rpm, stirring at the rotating speed of 800-900 rpm to disperse uniformly, adding the rest raw materials, and defoaming to obtain a resin component.

In a more preferred embodiment, the first step, the method for preparing the resin component, comprises the following steps: adding polyurea resin into a reactor, adding a dispersing agent and a foam inhibitor under the stirring of 250rpm, stirring uniformly, adding a filler under the stirring of 300rpm, stirring uniformly under the stirring of 850rpm, adding the rest raw materials, and defoaming to obtain a resin component.

The scribing varnish, also known as a marking varnish, of the present invention has no particular limitation on the application field of the scribing varnish, including but not limited to: road marking paint, factory marking paint, parking lot marking paint and underground garage marking paint.

Examples of marking paints include, but are not limited to, parking spaces, zebra crossings, yellow stops, lane lines, guide arrows, reflective marking paints.

The present invention will now be described in detail by way of examples, and the starting materials used are commercially available unless otherwise specified.

Examples

Example 1

Embodiment 1 of the present invention provides a polyurea material comprising a resin component and a curing component in a weight ratio of 1: 0.25.

the raw materials of the resin component comprise 55 parts of polyurea resin, 90 parts of filler and 15 parts of auxiliary agent in parts by weight. The polyurea resin is German Bayer Desmophen NH1420, and the amine value is 199-203 mgKOH/g (the average value is 201 mgKOH/g). The filler is a combination of talcum powder and titanium dioxide, and the weight ratio of the talcum powder to the titanium dioxide is 1: 5; the particle size of the talcum powder is 58 mu m, and the talcum powder is purchased from Guangzhou Guangzhong chemical Co., Ltd; the titanium dioxide is rutile titanium dioxide with the particle size of 58 mu m, and is purchased from Yino chemical technology Co. The auxiliary agent comprises a dispersing agent, a foam inhibitor, color paste and a silane coupling agent, wherein the weight ratio of the dispersing agent to the foam inhibitor to the color paste is 0.5: 0.1: 4.4: 10.0. the dispersant is a high molecular polymer dispersant, is a Germany Di high type 628 dispersant, has an acid value of 35mgKOH/g, and has a viscosity of 100 mPas at 25 ℃. The suds suppressor was an organosilicon suds suppressor purchased from the Venturi chemical model LeAd239 suds suppressor. The color paste is yellow color paste and is purchased from merck chemical company Limited in Guangzhou; the silane coupling agent is KH 560.

The raw materials of the curing component comprise a curing agent and a plasticizer, and the weight ratio of the curing agent to the plasticizer is 9: 1. the curing agent is hexamethylene diisocyanate trimer curing agent, purchased from Bayer BAYER curing agent N75 of Germany; the plasticizer is diisononyl phthalate.

The preparation method of the polyurea material comprises the following steps:

step one, resin component preparation: adding polyurea resin into a reactor, adding a dispersing agent and a foam inhibitor under the stirring of the rotation speed of 250rpm, adding a filler under the stirring of the rotation speed of 300rpm after uniform stirring, adding the rest raw materials after uniform dispersion under the stirring of the rotation speed of 850rpm, and defoaming to obtain a resin component;

Example 2

Embodiment 2 of the present invention provides a polyurea material comprising a resin component and a curing component in a weight ratio of 1: 0.1.

the raw materials of the resin component comprise 40 parts of polyurea resin, 80 parts of filler and 5 parts of auxiliary agent in parts by weight. The polyurea resin is German Bayer Desmophen NH1420, and the amine value is 199-203 mgKOH/g (the average value is 201 mgKOH/g). The filler is a combination of talcum powder and titanium dioxide, and the weight ratio of the talcum powder to the titanium dioxide is 1: 15; the particle size of the talcum powder is 45 mu m, and the talcum powder is purchased from Guangzhou Guangzhong chemical engineering Co., Ltd; the titanium dioxide is rutile titanium dioxide with the particle size of 45 mu m, and is purchased from Yino chemical technology Co. The auxiliary agent comprises a dispersing agent, a foam inhibitor, color paste and a silane coupling agent, wherein the weight ratio of the dispersing agent to the foam inhibitor to the color paste is 0.1: 0.05: 4.0: 8.0. the dispersant is a high molecular polymer dispersant, is a Germany Di high type 628 dispersant, has an acid value of 35mgKOH/g, and has a viscosity of 100 mPas at 25 ℃. The suds suppressor was an organosilicon suds suppressor purchased from the Venturi chemical model LeAd239 suds suppressor. The color paste is yellow color paste and is purchased from merck chemical company Limited in Guangzhou; the silane coupling agent is KH 560.

The raw materials of the curing component comprise a curing agent and a plasticizer, and the weight ratio of the curing agent to the plasticizer is 2: 1. the curing agent is hexamethylene diisocyanate trimer curing agent, purchased from Bayer BAYER curing agent N75 of Germany; the plasticizer is diisononyl phthalate.

The preparation method of the polyurea material comprises the following steps:

step one, resin component preparation: adding polyurea resin into a reactor, adding a dispersing agent and a foam inhibitor under stirring at the rotating speed of 100rpm, adding a filler under stirring at the rotating speed of 200rpm after uniform stirring, adding the rest raw materials after uniform dispersion under stirring at the rotating speed of 800rpm, and defoaming to obtain a resin component;

Example 3

Embodiment 3 of the present invention provides a polyurea material comprising a resin component and a curing component in a weight ratio of 1: 0.5.

the raw materials of the resin component comprise, by weight, 70 parts of polyurea resin, 100 parts of filler and 25 parts of auxiliary agent. The polyurea resin is German Bayer Desmophen NH1420, and the amine value is 199-203 mgKOH/g (the average value is 201 mgKOH/g). The filler is a combination of talcum powder and titanium dioxide, and the weight ratio of the talcum powder to the titanium dioxide is 1: 3; the particle size of the talcum powder is 100 mu m, and the talcum powder is purchased from Guangzhou Guangzhong chemical Co., Ltd; the titanium dioxide is rutile titanium dioxide with the particle size of 100 mu m, and is purchased from Yino chemical technology Co. The auxiliary agent comprises a dispersing agent, a foam inhibitor, color paste and a silane coupling agent, wherein the weight ratio of the dispersing agent to the foam inhibitor to the color paste is 1.0: 0.15: 5.0: 12.0. the dispersant is a high molecular polymer dispersant, is a Germany Di high type 628 dispersant, has an acid value of 35mgKOH/g, and has a viscosity of 100 mPas at 25 ℃. The suds suppressor was an organosilicon suds suppressor purchased from the Venturi chemical model LeAd239 suds suppressor. The color paste is yellow color paste and is purchased from merck chemical company Limited in Guangzhou; the silane coupling agent is KH 560.

The raw materials of the curing component comprise a curing agent and a plasticizer, and the weight ratio of the curing agent to the plasticizer is 12: 1. the curing agent is hexamethylene diisocyanate trimer curing agent, purchased from Bayer BAYER curing agent N75 of Germany; the plasticizer is diisononyl phthalate.

The preparation method of the polyurea material comprises the following steps:

step one, resin component preparation: adding polyurea resin into a reactor, adding a dispersing agent and a foam inhibitor under stirring at the rotating speed of 400rpm, adding a filler under stirring at the rotating speed of 400rpm after uniform stirring, adding the rest raw materials after uniform dispersion under stirring at the rotating speed of 900rpm, and defoaming to obtain a resin component;

Example 4

Example 4 of the present invention provides a polyurea material, the specific embodiment of which is similar to example 1, except that the resin component further comprises 40 parts of a solvent.

Comparative example 1

Comparative example 1 of the present invention provides a polyurea material, the specific embodiment of which is similar to example 1, except that the weight ratio of the resin component and the curing component is 1: 0.6.

comparative example 2

Comparative example 2 of the present invention provides a polyurea material, the specific embodiment of which is similar to example 1, except that the filler is talc.

Comparative example 3

Comparative example 3 of the present invention provides a polyurea material, the specific embodiment of which is similar to example 1, except that the filler is titanium dioxide.

Comparative example 4

Comparative example 4 of the present invention provides a polyurea material, the specific implementation of which is similar to example 1, except that the particle size of the talc powder and the titanium dioxide in the filler is 20 μm.

Comparative example 5

Comparative example 5 of the present invention provides a polyurea material, the specific implementation of which is similar to example 1, except that the particle size of the talc powder and the titanium dioxide in the filler is 120 μm.

Comparative example 6

Comparative example 6 of the present invention provides a polyurea material, the specific embodiment of which is similar to that of example 1, except that the weight ratio of the dispersing agent, the foam inhibitor, the color paste and the silane coupling agent in the auxiliary agent is 0.05: 0.1: 4.4: 10.0.

comparative example 7

Comparative example 7 of the present invention provides a polyurea material, the specific embodiment of which is similar to that of example 1, except that the weight ratio of the dispersing agent, the foam inhibitor, the color paste and the silane coupling agent in the auxiliary agent is 0.15: 0.1: 4.4: 10.0.

comparative example 8

Comparative example 8 of the present invention provides a polyurea material, the embodiment of which is similar to example 1, except that the dispersant is a high molecular polymer dispersant, which is a germandy high model 690 dispersant, the acid value is 40mgKOH/g, and the viscosity at 25 ℃ is 35000mPa · s.

Comparative example 9

Comparative example 9 of the present invention provides a polyurea material, the specific embodiment of which is similar to example 1, except that the dispersant is a high molecular polymer dispersant, which is a german diyao's high-size 674 dispersant, the acid value is 5mgKOH/g, and the viscosity at 25 ℃ is 150mPa · s.

Comparative example 10

The comparative example 10 of the present invention provides a polyurea material, the specific implementation manner of which is similar to that of example 1, except that the auxiliary agent comprises a dispersant, a color paste and a silane coupling agent, and the weight ratio of the dispersant to the color paste to the silane coupling agent is 0.5: 4.4: 10.0.

comparative example 11

Comparative example 11 of the present invention provides a polyurea material, the embodiment of which is similar to example 1, except that the curing agent is a lysine diisocyanate curing agent, and the CAS number is 45172-15-4.

Evaluation of Performance

1. And (3) hardness testing: the polyurea materials obtained in examples 1 to 4 and comparative examples 1 to 11 were applied to the surface of cement concrete in a manner known to those skilled in the art, the thickness of the coating film was controlled to 65 μm, and the hardness of the coating film was measured using a pencil having a hardness of HB according to GB/T6739-2006 determination of paint film hardness by pencil method for color paint and varnish. Good was evaluated if no scratch occurred, and poor was evaluated if no scratch occurred.

2. Impact resistance test: the polyurea materials obtained in examples 1 to 4 and comparative examples 1 to 11 were coated on a tin plate with an applicator and dried at room temperature to obtain a coating film, the impact resistance of the coating film was measured by an impact tester in GB/T1732 + 1993 paint film impact resistance measuring method, a 1000g weight was freely dropped on a test plate from a certain height, and after three times of the test, the height of the coating film at which cracks, wrinkles and peeling occurred was observed with a 4-fold magnifying glass and calculated as the impact resistance. If the impact strength is more than or equal to 50kg.cm, marking as A; if the impact strength is 20-50 kg.cm, marking as B; if the impact strength is less than or equal to 20kg.cm, it is marked as C.

3. Testing powder falling: the coating films of the polyurea materials obtained in examples 1 to 4 and comparative examples 1 to 11 were placed outdoors in summer for 1 month, and the coating films before and after placement were wiped with clean copy paper. If no powder falls off from the surface of the coating film, marking as I; if a small amount of powder falls off from the surface, marking as II; if obvious powder falling appears on the surface, marking as III; if a large amount of powder falls off from the surface, it is marked as IV.

Table 1 results of performance testing

The polyurea material obtained in the embodiments 1-4 meets the requirements of the container state, the coating appearance, the chromaticity performance and the like in the industrial standard JT/T280 ground marking paint. The bend diameter of the polyurea material is less than 1mm after the polyurea material is tested according to GB/T6742-1986 paint film bend test (cylindrical shaft); the surface drying time is 3-15 min and the actual drying time is 6-24 h measured according to GB-T1728-1979 paint film putty film drying time measuring method. The abrasion resistance is less than or equal to 40 mg/750 g/500rpm measured according to GB-T1768 color paint and varnish abrasion resistance measurement rotating rubber grinding wheel method, which is far superior to the requirement of the industry standard.

The combination of the above experimental results shows that: the polyurea material prepared by the invention through the resin component and the curing component which are composed of polyurea resin, filler, dispersant, foam inhibitor and the like has the hardness of more than HB, the impact strength of more than or equal to 50kg.cm, and no powder body falls after the polyurea material is placed for one month. In addition, the polyurea material has the characteristics of quick curing and film forming, high toughness and high wear resistance, can be used for preparing the marking paint with various functional colors, such as weather resistance, high hardness, high wear resistance, high toughness and high adhesive force, and has the advantages of environmental protection, no solvent pollution, no heating construction, quick curing, higher wear resistance, impact resistance, scratch resistance, high toughness, long service life and the like compared with the existing marking paint.

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. The invention is not limited to the embodiments described above, but rather, many modifications and variations may be made by one skilled in the art without departing from the scope of the invention.

Claims

1. A polyurea material comprising a resin component and a curing component; the raw materials of the resin component comprise, by weight, 40-70 parts of polyurea resin and 80-100 parts of filler; the curing component comprises a curing agent and a plasticizer, wherein the weight ratio of the curing agent to the plasticizer is (2-12): 1; the weight ratio of the resin component to the curing component is 1: (0.05-1.0).

2. The polyurea material of claim 1, wherein the filler is selected from the group consisting of talc, quartz sand, titanium dioxide, calcium carbonate, barium sulfate, calcium sulfate, zinc oxide, alumina, mica powder, wollastonite, magnesium hydroxide, feldspar powder, glass powder, kaolin, fly ash, diatomaceous earth, and carbon black.

3. The polyurea material of claim 1, wherein the filler has a particle size of 45 to 100 μm.

4. The polyurea material of claim 1, further comprising 0 to 70 parts by weight of a solvent, excluding 0.

5. The polyurea material according to any one of claims 1 to 4, wherein the resin component further comprises 5 to 25 parts by weight of an auxiliary.

6. The polyurea material of claim 5, wherein the additive is selected from the group consisting of a dispersant, a foam inhibitor, a color paste, a silane coupling agent, a reinforcing fiber, a pearlescent agent, a luminescent agent, and a stabilizer.

7. The polyurea material of claim 6, wherein the dispersant has an acid number of 30 to 40 mgKOH/g.

8. The polyurea material of claim 6, wherein the dispersant has a viscosity of 100 to 300 mPa-s at 25 ℃.

9. A process for the preparation of a polyurea material according to any one of claims 1 to 8, comprising the steps of:

10. Use of a polyurea material according to any one of claims 1 to 8 in a paint for marking.